C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

Replacing lifters

Old Feb 21, 2009 | 03:45 PM
  #21  
dgrant3830's Avatar
dgrant3830
Tech Contributor
10 Year Member
 
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
Default

That video makes it sound really bad. I'm thinking you were absolutely correct to shut her down. I'm surprised the compresson tests came back good. I suggest contacting one of the forum vendors here that deal with engines and ask for an opinion. Since you were doing a burn-out, possible clutch let go?
Reply
Old Feb 22, 2009 | 11:28 AM
  #22  
nickolbag's Avatar
nickolbag
Thread Starter
Le Mans Master
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Aug 2005
Posts: 5,130
Likes: 3
From: Winter Park FL
Default

Originally Posted by dgrant3830
That video makes it sound really bad. I'm thinking you were absolutely correct to shut her down. I'm surprised the compresson tests came back good. I suggest contacting one of the forum vendors here that deal with engines and ask for an opinion. Since you were doing a burn-out, possible clutch let go?
I talked to Cartek(they build the motor) and they seemed to believe it was a top end issue. Since I checked everything in the top end but the lifters they were leaning towards that too.

As it was happening the first thing I thought of was exhaust or clutch. The clutch held fine and felt normal as I was rolling out of my burnout. When I took it out of gear during the roll it disengaged fine. So it feels fine. The noise doesn't sound in any way like it could be clutch.

If the clutch pedal was pushed in shouldn't the noise change a bit if it were the clutch? I know with the clutch pedal in the noise was consistant.
Reply
Old Feb 22, 2009 | 04:09 PM
  #23  
dgrant3830's Avatar
dgrant3830
Tech Contributor
10 Year Member
 
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
Default

I wouldn't think the compression test would come back good if it was a lifter that got thrashed. Do you remember if you still had oil pressure during the aftermath?
Reply
Old Feb 22, 2009 | 05:51 PM
  #24  
nickolbag's Avatar
nickolbag
Thread Starter
Le Mans Master
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Aug 2005
Posts: 5,130
Likes: 3
From: Winter Park FL
Default

Originally Posted by dgrant3830
I wouldn't think the compression test would come back good if it was a lifter that got thrashed. Do you remember if you still had oil pressure during the aftermath?
I checked that real quick before shutting it down. It was @ 40.
Reply
Old Feb 22, 2009 | 07:40 PM
  #25  
dgrant3830's Avatar
dgrant3830
Tech Contributor
10 Year Member
 
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
Default

I'm having trouble trying to figure out that source of the sound coming from the engine yet still having good compression. Accessories such as the ps pump, ac compressor? I'm guessing the hvac was off at the time but the idlers are still there of course. Still, the sound seems much worse than that. With all the unknowns, I think I would be getting it jacked all the way around, several knowing people present, then start it up very briefly in hopes of identifying the source of the sound. Oh, dumb quick thought here, did you look at the harmonic balancer?
Reply
Old Feb 22, 2009 | 11:50 PM
  #26  
nickolbag's Avatar
nickolbag
Thread Starter
Le Mans Master
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Aug 2005
Posts: 5,130
Likes: 3
From: Winter Park FL
Default

Did not check the harmonic balancer. Will do though. I have a friend coming over Saturday. I'll have to start it up and maybe he can help listen. Maybe I can find a few more people too.
Reply


Thread Tools
Search this Thread

All times are GMT -4. The time now is 06:36 PM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 11:09:53


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE